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用低压离子色谱法测定水中的Ｍｇ２＋和Ｃａ２＋离子，Ｍｇ２＋离子在０～１０μｇ／ｍＬ，Ｃａ２＋在０～１２．５μｇ／ｍＬ浓度范围内，分别与其色谱峰具有良好的线性关系。Ｍｇ２＋和Ｃａ２＋离子的检测限分别为０．１７３μｇ／ｍＬ和０．２７５μｇ／ｍＬ，其相对标准偏差分别为１．３２％和３．６４％，回收率分别为９０．８％和１０１．３％。该方法快速、准确，适用于环境水样及放射性水样中Ｍｇ２＋和Ｃａ２＋离子的分析。
The determination of Mg2 + and Ca2 + ions in water by low pressure ion chromatography showed a good linear relationship with the chromatographic peaks of Mg2 + and Mg2 + in the range of 0 ~ 10μg / mL and 0 ~ 12.5μg / mL respectively. The detection limits of Mg2 + and Ca2 + were 0.173μg / mL and 0.275μg / mL respectively. The relative standard deviations (RSDs) were 1.32% and 3.64%, and the recoveries were 90.8% and 101.3% . The method is rapid and accurate and is suitable for the analysis of Mg2 + and Ca2 + ions in environmental water samples and radioactive water samples.